Electric-lamp socket.



F. y. Poom. BLEGTRG LAMP SGKBT.

APPLIATION FILED APE. 15, 1909.

` Patented July 26, WW.'

UNiTED sTATEs PATENT oEEicE.

FREDERICK P. POOLE, 0F BRIDGEPORT,` CONNECTICUT, ASSIGNOR 'IO THE BRYANT ELECTRIC COMPANY, N ECTICUT.

0F BRIDGEPGRT, CONNECTICUT, A CORPORATION OF CON- ELECTRIC-LAMP SOCKET.

Specification 0f Letters PatentlatentedlJuly 26, 1910.

Application tiled April 15, 1909. Serial No. 490,098.

To all whom it may concern:

Be it known that I, FREDERICK P. POOLE, a citizen of the United States of America, residing in the city of Bridgeport, in the county of Fairfield, in the State of Connecticut, have invented a certain new 'and useful Improvement in Electric-Lamp Sockets, of which the following is a specification.

The object of my invention is to produce a simple construction of key socket for electric incandescent lamps, with a double break of the circuit ,when the key is turned to cut oit the current.

In the accompanying drawings Figure l is a side elevation of the internal parts of aI socket4 embodying my invention, the shell and cap being shown in dotted lines; Fig. l is a view from 4the opposite side, the shell and cap not being indicated; Fig. 3 is an inverted perspective view; Fig. 4 is a. sectional view; Fig. is a similar view with the key socket turned t0 the closed posit-ion.

I have shown my invention as embodied in a socket of the well known Tournier single button type (Tournier Patent No. 559,232) that is to say, the porcelain or other insulating body A. is in a single button or single piece, with a transversei chamber c t'or the key stein B mounted lin a metal frame F, and upon the end ot' the porcelain is' supported the usual screw shell S to receive the lamp base. The usual central contact is on the inner free end of a biliding post or arm I), Fig. 2, mounted in a recess in the side of the porcelain bodg1 with a binding screw d for one ot the wires. The inner end ot' this arm D projects into the interior of the screw shell through the usual side opening a; formed there for the purpose, Fig. 2.

The key stein B has the usual. handle b,

Fig. 4, and near the opposite end, within' the traine F, it carries the usual oblong cam or switch block bl with lost motion, this cam or switch piece being of conducting material. The adjacent end of the stem has some freedom of motion in its bearing slot f in the frame, Fics. l and A springactuated plate E, which in this case is itself a bent spring secured at c to the frame F, bears at its tree end against the cani or tumbler L1, tending to press it toward the screw shell. When the key turned to close the circuit, one end of the oblong cam b1v Will bear against the anged end of the shell as shown in Fig. 5. At the same time the other end ot' the cam will have pressed the free end ot the sprino- E into Contact with a spring linger K, Fig. 5), which is in electrical Contact with, but clamped to the insulating body by the terminal plate or binding post P, for the second' conductor. IVhen the key is turned to cut off the current, the circuit is broken at tivo points, namely, where the switch block leaves the screw shell S and where the spring F leaves the contact finger K, Figs. l and 4. The spring E bearing upon the switch block maintains `the spring.

I claim as my invention l. An electric lamp key socket', comprising an insulating body and screw shell and center contact, in combination with wire terminals, a key stem and a switch block mounted ou said stem with lost motion, a spring to act. on the switch block, a contact carried by ythe insulating body. and a springactuated plate to make connection with said contact, the switch block acting to close` the circuit through said contact and to break it with a double break.

An electric lam.) key socket, comprising an insulating bo y and screw shell and center contact with two binding' posts in combination with a spring contact carried by the .insulating bodya conducting switch block interposed between the said. spring contact and the shell and adapted to make and break connection on both sides of the switch block,` and a spring to act on the switch block.

3. An electric lamp key socket, comprising an insulating body, screw Ashell and center contact in combination with Wire terminals, a key stem, a spring contact carried by the ii'isulating body, 'a spring-actuated plate to make connection with said contact, and a switch block on the key stein acted .0n by said spring-actuated plate, as and Jfor the purpose described. p

In testimony whereof I have signed my naine to this specification, in the presence of Itwo subscribing witnesses.

` FREDERICK l. POOLE.

Witnesses:

F. E. SEELEY, A. H. JONES. 

